Make your trip to the Biodome worthwhile by opting to do the combo package with the Planetarium and the Insectarium with garden tour. Also, I noticed the long lines in buying tickets, so buy your tickets ahead of time...online, and just show your printed scanner or on your phone when going in.
Everything is done indoors, so need to worry about rain, being cold, etc.
My favorite exhibit are the penguins. They also have exotic trees, birds, and one of the biggest rodents in the world. If you've seen the movie Princess Bride, where they enter Fire Swamp...it's kind of like that rodent.
Way to many kids running around, but it evened out at the Planetarium and at the Insectarium.